Hydrological Dynamics II: Groundwater and Hydrological Connectivity

Gilvear, David; Bradley, Chris

doi:10.1002/9781444315813.ch7

Cited by 8 publications

(7 citation statements)

References 50 publications

(79 reference statements)

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“…The isotopic evidence indicate that the site is supplied by infiltration and local groundwater flow. For instance, the samples show bomb 14 C values (>100 pMC) as well as the δ 13 C content, which shows a shift towards enrichment by organic material (-20 ‰). However, the groundwater has a higher mineral content, especially in Na + and Cl -.…”

Section: Infiltration and Local Groundwater Exfiltration Sitesmentioning

confidence: 99%

“…Table 1 shows the results from the radiocarbon dating and the corresponding calculated ages using both conventional calculation [Tamers, 1975] and the Vogel [1970] model. The samples that have the 14 C values higher than 85 pMC and bomb 14 C values were interpreted as indicating the infiltration areas (Kappersbult, Deurze, Oudemolen and Loon). The relationships of the 14 C values with δ 13 C (Figure 3a) and the reciprocal of HCO 3 (Figure 3b) can be classified into two groups for the groundwater with 14 C between 45 to 65 pMC.…”

Section: Ion Composition and Principal Component Analysis (Pca)mentioning

confidence: 99%

“…The groundwater samples under present-day infiltration regimes, post 1950, are identified by bomb 14 C (>100 pMC) as well as 14 C values higher than 85 pMC [Vogel, 1970]. Additionally, the δ 2 H and δ 18 O values for these samples are similar to the rainwater values at the recharge time (δ 18 O = -7.5 ± 0.5 ‰ for The Netherlands), which indicates the dominance of modern water [Clark & Aravena, 2005;Mook, 2006].…”

Section: Infiltration and Local Groundwater Exfiltration Sitesmentioning

confidence: 99%

“…The wetland vegetation is strongly infleunced by hydrology [Wheeler & Shaw, 1995;Gilvear & Bradley, 2009], notably by the interactions between local, sub-regional and regional groundwater flow systems [Tóth, 1963;Schot & Molenaar, 1992;Dahl et al, 2007;Van Loon et al, 2009]. Such interactions among the groundwater flows lead to different types of groundwater-dependent ecosystems [Wassen et al, 1990].…”

Section: Introductionmentioning

confidence: 99%

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Natural Isotopes Identify Changes in Groundwater Flows Affecting Wetland Vegetation in the Drentsche Aa Brook Valley, The Netherlands

Elshehawi¹,

Bregman²,

Schot³

et al. 2019

J. Ecol. Eng.

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types of wetlands, agricultural fields, heathlands and small villages. The heathlands, forests and wetlands are all part of a protected nature reserve [Van Diggelen et al., 1995]. Different types of wetland vegetation are dependent on various water sources, with the biodiversity-rich fen peatlands primarily depending on the groundwater flows from phreatic and semi-confined groundwater aquifers [Grootjans et al., 1993; Van Diggelen et al., 1995]. Everts & De Vries [1991] illustrated the hypothetical groundwater systems in Drentsche Aa based on the vegetation gradients using the theoretical framework from the groundwater systems by Toth, [1963] (Figure 1). These

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Section: Infiltration and Local Groundwater Exfiltration Sitesmentioning

confidence: 99%

Section: Ion Composition and Principal Component Analysis (Pca)mentioning

confidence: 99%

Section: Infiltration and Local Groundwater Exfiltration Sitesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Natural Isotopes Identify Changes in Groundwater Flows Affecting Wetland Vegetation in the Drentsche Aa Brook Valley, The Netherlands

Elshehawi¹,

Bregman²,

Schot³

et al. 2019

J. Ecol. Eng.

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“…For the characteristic flooding regime of the Pantanal, which is responsible for its enormous biodiversity, the groundwater in this region plays an important role. It is closely connected to the surface water (Mitsch and Gosselink, ), and thus, its inflow and outflow regulate the height of the water table on the floodplain (Gilvear and Bradley, ). To assess the most important hydrological processes of the wetland, water balance studies including the groundwater–surface water interactions are indispensable (Silva and Girard, ).…”

Section: Introductionmentioning

confidence: 99%

A tracer‐based simulation approach to quantify seasonal dynamics of surface‐groundwater interactions in the Pantanal wetland

Schwerdtfeger

Hartmann

Weiler

2016

Hydrological Processes

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The Pantanal wetland is one of the least explored regions of South America. It is characterized by an outstanding flora and fauna adapted to a seasonal flood pulse controlled by a dry and a wet season within each year. The resulting inundation covers in average an area of approximately 150 000 km 2 and is seen as the most important driver for ecological integrity. Evaporation from the large floodplain is supposed to influence the climate of the whole continent. The regional groundwater is connected to the surface water and plays an important role for the characteristic flooding regime by regulating the wetland's water table. The water balance assessment of the wetland and the internal water exchange between surface and groundwater is therefore of high relevance for the conservation of the Pantanal biodiversity. Despite of its importance, water balance studies including groundwater-surface water interactions based on field data are rarely undertaken. This is mainly due to the remoteness and difficulty in accessing this area, which results in lack of data. In our study, we developed a new tracer-based model to simulate the spatio-temporal surface and subsurface fluxes for a range of water bodies. The model was able to simulate these fluxes considering a dynamic simulation of inflow and outflow using a newly collected 2-year dataset of water levels, stable water isotopes and chloride collected from several water bodies in the northern Pantanal region. Quantitative differences between water bodies according to their location in the floodplain were determined by the flooding regime and connectivity as well as sitespecific characteristics, such as hydraulic conductivity and water depth. Our model simulated water balance fluxes with a Nash-Sutcliffe efficiency of 0.61, whereas it simulated stable water isotopic compositions better than chloride. We present the first study based on field data for the Pantanal, which is able to quantify water balances fluxes. Because their representation in global climate and land cover products is insufficient, our simulation results are valuable for validating large-scale models.

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Archaeology and paleogeography of a Lake‐Wetland complex: Modeling the postglacial evolution of the Kawartha Lakes, Ontario

Conolly

2020

Geoarchaeology

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This study uses a combination of isostatic rebound, hydrological flow, and sedimentation models to generate predictions about the postglacial evolution (from ca. 12.0 ka cal BP to the modern‐day) of the Kawartha Lakes region of central Ontario, Canada. Changes in shoreline and wetland configuration are mapped and quantified so as to inform understanding of the environmental history of the region and illuminate the manner of its evolution. This knowledge is discussed in the context of the human history of the region, particularly the relationship between ancestral Indigenous communities and their relationship to lakes and wetlands. Areas of significant shoreline transgression are identified and thus where inundated archaeological sites are likely to exist. The scale of loss of wetland areas as a result of 19th‐century dam construction is also estimated along with the impacts of settler dams on Michi Saagigg Nishaabeg First Nations traditional harvesting practices.

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Hydrological Dynamics II: Groundwater and Hydrological Connectivity

Cited by 8 publications

References 50 publications

Natural Isotopes Identify Changes in Groundwater Flows Affecting Wetland Vegetation in the Drentsche Aa Brook Valley, The Netherlands

Natural Isotopes Identify Changes in Groundwater Flows Affecting Wetland Vegetation in the Drentsche Aa Brook Valley, The Netherlands

A tracer‐based simulation approach to quantify seasonal dynamics of surface‐groundwater interactions in the Pantanal wetland

Archaeology and paleogeography of a Lake‐Wetland complex: Modeling the postglacial evolution of the Kawartha Lakes, Ontario

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